Not much. The rules have emerged, there's only small amounts of deliberate interference with that natural process.* Deliberate societal rules (statute laws, rulings) have to fit to what's politically viable, which is to say, what people in general like: and people in general are incoherent, only diffidently cooperative, and run on intuition, so mostly we get accidental rules instead of deliberately designed ones.

* Interesting instance of when the word "natural" applies to things created by humans.